U.S. Weed Information: Lotus corniculatus, Bird's Foot Trefoil is listed in; Weeds of the Northeast and Weeds of Nebraska and the Great Plains. Plants included here may become weedy or invasive.

Invasive/Noxious Weed Information: Lotus corniculatus is listed by the University of Georgia, Center for Invasive Species and Ecosystem Health.

Wetland Indicator: In North America Lotus corniculatus, Bird's Foot Trefoil has the following wetland designations; Arid West, FAC; Atlantic and Gulf Coastal Plain, FACU; Eastern Mountains and Piedmont, FACU; Great Plains, FACU; Midwest, FACU; Northcentral & Northeast, FACU; Western Mountains, Valleys, and Coast, FAC.
FACW, Facultative Wetland, usually occur in wetlands, but may occur in non-wetlands
FAC, Facultative, occur in wetlands and non-wetlands
FACU, Facultative Upland, usually occur in non-wetlands, but may occur in wetlands
UPL, Obligate Upland, almost never occur in wetlands.

Threatened/Endangered Information: No information available.

Genus Information: More than 70 species in Lotus in the contiguous United States, Canada and Mexico. Approximately 15 species in Arizona. The Plant List includes 504 scientific plant names of species rank for the genus Lotus. Of these 140 are accepted species names.

The genus Lotus is under current taxonomic review and many species are now classified under the genus Acmispon.

Comments: Photos above taken March 25, north of Superior, AZ, in the Tonto National Forest, Maricopa County.

Although listed as an introduced species, Lotus corniculatus is cultivated in North America under the name Birdfoot Deervetch. Lotus corniculatus has acquired several common names some of which are also used for other Lotus species.